Control mechanism.



H. HAUDENSGHILD.

CONTROL MECHANISM. APPLiGATION FILED JAN.20,190&

1,006,749. Patented 001L2 1, 1911.

I IIIHHHW' UNITED sTA'rasPATENT OFFICE.

HARRY HAUDENSCHILD, OF TOLEDO, OHIO. ASSIGNOR TO THE F. BISSELL COMPANY,

' OF TOLEDO, OHIO, A CORPORATION OF MICHIGAN.

CONTROL MECHANISM.

Specification of Letters Yatent.

Patented Oct. 24, 1911.

Applicationflled January 20, 1908. Serial No. 411,733.

specification, reference being bad therein to the accompanying drawings.

The invention relates to controlling mechanism for electric motors, and more particularly. to the means by -\Vl1l(:l1 said motor may be run at variable speeds and instantaneously stopped when desired.

, The invention consists in the peculiar construction of a rheostat and the controlling switch therefor; further in the (JOITlbllltttlOll therewith of a brake mechanism for overcoming the inertia of the motor, and further in the peculiar construction, arran ement and combination of parts as hereina tor set forth.

In the drawings-Figure 1 is a front elevation of the controlling mechanism in connection with the motor to which it is applied; Fig. 2 is a longitudinal section. Fig. 3 is an elevation of the rotary cap.

The invention is particularly designed for use in connection with small electric motors such, for instance, as sewing machine motors where but a limited space is availalile, and it is therefore an object to condense the mechanism by arranging the parts compactly as possible.

It 15 a urther object to produce a control inwhich the circuit closure, the rheostatic switch and the mechanical brake mechanism are all operated in proper sequence by the sin 1e actuating connection.

till further it is an object to render the stopping of the motor automatic upon the release of the control.

' These objects are all attained by a construction as follows:

A is a hollow drum or spool member prefcrablyiformed of insulating material and B are resistance conductors mounted about said drum in a peripheral groove therein.

The member A is suitably mounted preferablyeina an annular frame member C which may be attached directly to'or formed integra l with the frame of" the motor 'D. E is ca 0st arrangedconcentrically' withiw'the ho low];mend-bet A. and having revolnhly mourned therongthe member This meta-J her is preferably in the form of a hollow drum or barrel, within which is arranged a coil spring U, one end thereof being scoured to the post E and the opposite end to the member F.

ll is a traveling contact arm projecting from the member 1" and l is a spring contact carried by this arm. This contact member l. is adapted to successively engage with a series of contact pins J, which are arranged in a segmental path within the hollow member A, and said member I preferably engages the outer faces of said pins. K is a contact spring connected to one of said contact pins J and extending into proximity with another pin ofthe series J.

L is an insulated arm or projection on the member F which during the rotation thereof will bear against .the spring contact K and move the same into connection with the contact pin t With the arrangement above described, the member F is normally held by the ten sion of the spring G in a position Where the motor circuit is open, but upon the rotation of said member the contact I will successivelywngagc the contact pins J first closing the electric circuitwith all of the resistance windings B therein and then successively cutting out portions of the resistance. During this movement the insulated contact member L will. also be rotated and at a certain point in the operation will press against the spring K thereby effecting a coupling between the contact pins J and J this occurring when the contact member I is in connection with the pins of the series midway between the pins J and J As a result portions of the. resistance windings B will be connected into the motor circuit in parallel thereby lowering the resistance, while distributing the heating effect in the windings. Thus the s weed of rotation of the motor may be controlled by varying the position of the rotary member F.

To offset a quick stopping of the motor and the mechanism driven thereby a me chanical brake isnecessary. This brake is preferably applied directly to the periphery or pole face of the rotor, and as shown is arranged between the rotor and stator and in the space intermediate the poles of the stator. In detail M are brake shoes prefer- One end of each slroc is anchored in the r is prefcrablya flexible belt; or band U, which stator preferably by forming dovetail slots engages a peripheral groove V in said pulley in the lamina: of the stator pole and by and may be attached to suitable actuating forming heads M on the ends of the shoes connection, such as the treadle of a sewing ltl for interlocking with said slots. This machine. 7 construction permits of inserting the brake l lVhat I claim as my invention is: shoes laterally into engagement with the l l. A rheostat comprising a hollow body, stator, and of quickly removing and replacl a resistance conductor Wound about said ing' them when necessary. The resiliency of l the brake shoes M will hold them out of conbody for cutting in or out resistance. 75 tact with the periphery of the rotor. eXceptg 2. A rheostat comprising a hollow body, ing where drawn into contact; by application a resistance conductor Wound about said of the braking force. This application of f body, and a rotary switch within said body the brakes is cll'cctcd through the mediun'i'of for cutting in or out resistance. connections I attaclwd to the free ends f l 3. A rheostatcomprising a hollow body, the ll1ill(( sllOO. M and extending therefrom l a resistance conductor wound ,upon said tl'irougll an aperture in the hollow meu'll'ier-l i D A and supporting .l'ixunc thcrcl'or into the l body controlling said resistance, and a rospace within the member Q is a stirrup l tary member forming a eorerfor said switch connected to the filtllllltl'a' l. and prefera ly l and the actuating member therefor. provided with a take-up niljllslmcnt formed t. A rheostat comprising a hollow spool, by a. screw eye Q having a thrciulcil shank a resistance conductor wound about the pecngaging a lhrczulcd socket in the stirrup. riphcry of said spool, a switch within said it is a crank pin projecting from the memspool. having a movable contact .member bcr l' and engaging a bearing- R in the rcvolublc about the axis of the spool and an il 'lll].)( actuating member for said revoluble con- With the ahore described constructi n in tact member forming a closure for the space tin normal position in which the member F within the spool. is hchl by the tcnsion of the spring U the 5. A rheostnt comprising a spool, a recranlt pin K. through its engagement with sistanee conductor Wound about said spool, the icaring h and the stirrup (Q, will draw a u -y member within said spool, a travelti'HVJllYlllll upon the mcmbcn l and hohl ing contact carried by saidrotary member, the brake shoes M in fricti nal contact with cooperating stationary contacts Within the llll' pcriphccv of the rotor so no to prevent spool, and a spring surrounding the axis of rotation of the latter. .\I-1 Mu l]. however, as said rotary member and actuating the same the member l is rotated against the tension i on direction,

of the spring (l. and in the direction f r l 6. A rheostat comprising a spool, a reclosing the motor circuit, tllc pin It. will be sistnnce conductor wound about the periphwithdrawn from its bearing, permitting the ory of aid ool, a rotary member within tension of the brake sllfit's M to move them the spool, a movable electric contact carried out of contact with the rotor so that thc by said rotam member, cooperating stalatter is free to revolve. in the reverse optionary contacts Within the spool, a coil cration, the tension of the spring (i will spring surrounding the axis of said rotary more the member l to open lhc motor cirmeniher and actuating the same in one dicuit, and at the some time the pin H is rection. a pcriphcrall i' groo i'ed closure fordrawn tlownuard to again bear against. the f u space within the spool forming an actustirrup Q and lll'tl w the shoe M into contact ring memb r for said rotary member, and a with the rotor. During this inmt'nu'ul. the h nd secured Within the per pin It is nstantly gaining lcwrage as i of said :u-tuutim: member for operating the approaches the dead ecntcr, and V consosame against the tension of the spring. V oucntly the lpoucr applied to the brakes is 7. A rheostat comprising a spool of m- ;n-catest at t in com -ih-no of the movcmcnt. whiting n'mlcrial. a resistance conductor l \n :uljlutincnl may he cll'i-ctcil ill any limc i wound pcripherally thercabout, a rotary by tllh'lllflilglllg the stirrup (Q, from the pin l number within said spool. a series of stah and rotating it one way or the other i tionary contact pins, within said spool, a \rlu-rchy it is longitudinally adjusted upon l traveling Contact carried by said rotary the thrcailcil shank of the screw eye Q. member and adapted to successively engage lr operating the inrmbcr F a pulley T is with said stationar contact pins.

prcl'crahtr M't'lllttl thereto and this pulley i 1 8. A rheostat comprising a hollow? spool, employed to Form a closure for the recess l a resistance conductor wound about thli pewithin the hollow member A. The member l riphery of said spool, a segmental series of is also preferably formed ol' insulating l contacts within said hollow spool connected material so that. the switch meclumism is in with sections of said resistance. a rotary closed in completiinsulating housing. .contuct member for successively engaging The actuating connection for the pulley '1 the contacts of said segmental series and spool, a segmental series of contacts within said spool connected with said resistance, a rotary arm, a segmental contact carrier by said arm and successively engaging said segmental contacts, a coupling contact extending from one of said segmental contacts into proximity with another contact of the series but normally separated therefrom, and a bearing on said rotary arm for operating said coupling contact.

10. A rheostat comprising a hollow spool, resistance windings mounted upon said spool, a segmental series of contacts within said spool, a post within said spool concentrio with said segmental contacts, a member revolubly mounted upon said post, a contact member secured to said revoluble member, and movable in a path outside said segmental series of contacts in progressive contact therewith, a segmental contact extending on the inside of said segmental series of contacts from one member thereof extending into proximity with another memher, and an insulated member upon said revoluble member for ressing said inner segmental contact mem er to eflect a coupling between sald segmental contacts.

11. The combination with an electric motor, of a controlling switch therefor, a housing for said switch and a rotary closure for said housing forming an actuating means for the switch.

12. The combination with an electric motor, of a controlling mechanism therefor, a housing for said controlling mechanism, and a rotary closure for said housing forming an actuating member for said mechanism.

In testimony whereof I afiix my signature in presence of two witnesses.

' HARRY HAUDENSCHILD.

Witnesses:

FREDERICK BissnLn, Amos L. CONN. 

